Preserving preparation.



ifi i liislil na ipoetsl e g UNITED STATES IZAUUIEIET]? ()ITI?I(1IE.

WALTER SCHOELLER AND WALTHER SCHRAUTH, OF BERLIN, GERMANY, ASSIGNORS TO FABBENFABRIKEN VORM. FRIEDR. BAYER & (30., OF ELBERFELD, GERMANY, A

CORPORATION OF GERMANY.

nosz144.'

No Drawing.

. PRESERVING PREPARATION.

Patented Feb. 1'7, 1914.

To all whom it may concern:

Be it lmown that we, WALTER SCHOELLER and WALTHZER SCHRAUTH, doctors of philosophy, chemists, citizens of the German 5 Empire, residing at Berlin, Germany, have invented new and useful Improvements in Preserving Preparations, of which the following is a specification.

The invention described in our U. S. Letters Patents Nos. 967,841 and 967,842 of August 1-6, 1910 relates to the manufacture of preparations suitable ascoatin s paints or varnishes which are remar a le for their good s properties. They are obtained by adding to suitable coatings, paints or varnishes salts or anhydrids of mercury substituted organic acids. We have now found that the same efiect can be obtained by adding to suitable coatings, paints or varnishes instead of the above mentioned compounds, complex compounds which contain mercury joined to an aromatic nucleus and are capable of forming salts with heavy metals and of forming anhydrids, e. g. the anhydrids of oxymercuric phenols (hydrargyrum carbolicum), dinitrophenol, cresols, or sulfonic acids, etc, oxymercuric anilins, toluidins, etc., and the metal (Ca, Cu, Pb, Hg, etc.) salts of these mercury substituted phenols, cresols, sulfonic acids etc.

To the class of anhydrids of oxymercuric phenols, there belongs for example a substance having probably the formula:

which is an anhydrid of oxy-mercuric-orthochlorphenol. Thisbody is obtained by heating molecular proportions of sulfate of mercury and o-chlorphenol in aqueous solution. The thus obtained anhydrid of oxy-mercuric-ortho-chlorphenol separates in crystalline form and is completely insoluble in water. The crystals are then mixed to the extent of about 2% with any of the varnishes generally employed to ships bottom and furnished coatings of remarkable preserving properties.

Instead of the anhydrids themselves we may employ as additionsto the varnishes the salts of these anhydrids made with heavy metals, such as copper, lead, zinc, etc. These salts are obtained by first converting the! T anhydrids into the corresponding alkali salts for example:

anhydrld sodium salt and then treating the alkali salt with a solution of a heavy metal salt for example:

/\:ON8 K/ rbkomceomamwmc Hi I i I BgOH These salts are also completely insoluble in water and combine the poisonous efiect of mercury with that of the corresponding heavy metal. Of these metal salts also about 2% are added to the ordinary varnish employed for palntlnW' Instead of the ochlorphenol derivatives described above we may also employ 75 the corresponding nitro derivatives:

v M) CLzlSSIr or the corresponding o'xymercuric anilin derivatives:

Or the acetyl-ortho-a-mino derivatives:

Na-co-cm or derivatives thereof such as sulfonic acids. All these substances added to the amount of about 2% to varnishes generally employed for painting ships bottoms furnish coatings of remarkable preserving properties.

The terms oxy-mercuric phenol deriva-. tives is used as generic to the hereindescribed compounds whether in the form of their anhvdrids or of their metal compounds.

We claim 1. The hereindescribed coating material comprising an oXy-mercuric phenol derivative, in conjunction with a suitable vehicle, substantially as described.

2. The hereindescribed coating material comprising a substituted oxy-mercuric phenol derivative, in conjunction with a suitable vehicle, substantially as described.

3. The hereindescribed coating material comprising anitro-oxy-mercuric phenol derivative, in conjunction with a. suitable vehicle, substantially as described.

4:. The hereindescribed coating material comprising an anhydrid of an oxy-mercuric phenol, in conjunction with a suitable vehicle, substantially as described.

The hereindescribed coating material comprising an anhvdrid of a substituted oXy-mercuric phenol, in conjunction with a suitable vehicle, substantially as described.

6. The hereindescribed coating material comprising the anhydrid of a mercury substituted dinitrophenohin conjunction with a suitable vehicle, substantially as described.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

Da. PHIL. WALTER SOHOELLER. DR. WALTHER SCHRAUTH.

Witnesses HENRY HAsrEn, WOLDEMAR HAUPT.

' Copies of patent may be obtained for five cents each, by addressing the Commissioner of Patents, I Washington, D. 0." 

